Strontium oxide
| Strontium oxide[1] | |
|---|---|
 |
|
 |
|
|
Strontium oxide |
|
|
Other names
Strontia |
|
| Identifiers | |
| CAS number | 1314-11-0  |
| Properties | |
| Molecular formula | SrO |
| Molar mass | 103.62 g/mol |
| Appearance | colorless cubic crystals |
| Density | 4.70 g/cm3 |
| Melting point |
2531°C |
| Boiling point |
> 3000 °C (decomp) |
| Solubility in water | reacts, forms Sr(OH)2 |
| Solubility | miscible with potassium hydroxide slightly soluble in alcohol insoluble in acetone and ether |
| Refractive index (nD) | 1.810 [2] |
| Structure | |
| Crystal structure | Halite (cubic), cF8 |
| Space group | Fm3m, No. 225 |
| Coordination geometry |
Octahedral (Sr2+); octahedral (O2–) |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-592.0 kJ·mol−1 |
| Standard molar entropy S |
57.2 J·mol−1·K−1 |
| Specific heat capacity, C | 44.3 J·mol−1·K−1 |
| Hazards | |
| EU Index | Not listed |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Strontium sulfide |
| Other cations | Beryllium oxide Magnesium oxide Calcium oxide Barium oxide |
| Related compounds | Strontium hydroxide |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Strontium oxide or strontia, SrO, is formed when strontium reacts with oxygen. Burning strontium in air results in a mixture of strontium oxide and strontium nitride. It also forms from the decomposition of strontium carbonate SrCO3. It is a strongly basic oxide.
Contents |
[edit] Uses
About 8% by weight of television picture tube glass is strontium oxide, which has been the major use of strontium since 1970.[3] Color televisions and other devices containing color cathode ray tubes sold in the United States are required by law to use strontium in the faceplate to block X-ray emission (these X-ray emitting TV's are no longer in production). Lead oxide can be used in the neck and funnel, but causes discoloration when used in the faceplate.[4]
[edit] Reactions
Elemental strontium is formed when strontium oxide is heated with aluminium in a vacuum.[1]
[edit] References
- ^ a b Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–87. ISBN 0849305942.
- ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398
- ^ Ober, Joyce A.; Polyak, Désirée E.. "Mineral Yearbook 2007:Strontium". United States Geological Survey. http://minerals.usgs.gov/minerals/pubs/commodity/strontium/myb1-2007-stron.pdf. Retrieved 2009-09-14.
- ^ Méar, F; Yot, P; Cambon, M; Ribes, M (2006). "The characterization of waste cathode-ray tube glass.". Waste management 26 (12): 1468–76. doi:10.1016/j.wasman.2005.11.017. ISSN 0956-053X. PMID 16427267.
[edit] External links
|
|||||
 |
This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. |
